This short introduction aims to provide archaeologists of all backgrounds with a grounding in the principles, materials, and methods of geology. Sections include coverage of main rock-forming minerals and classes of rocks. Geological maps and structures are introduced, and the elements of geological stratigraphy and dating are explained and related to archaeological experience. Fluvial and coastal environments are important archaeological landscapes and their formation processes, sediments and topography are outlined. Stone for building, implement-making, tool-making, and making mortar are all discussed, followed by an introduction to clays and ceramics. A final chapter introduces metallurgical landscapes: metalliferous ores, mining and smelting, and metal-making industries. Each chapter ends with a short reading list, and many have selected case-histories in illustration of the points made. Included is a glossary of technical terms.